2 MFDs about $50 on Amazon:
http://www.amazon.com/MFD-Cougar-Multifunctional-Cockpit-Panel/dp/B002NUD40S/ref=sr_1_1?ie=UTF8&qid=1299231346&sr=8-1
Dell 20" monitors around $100 (if you don't like Dell, there are other brands at discount on this site)
http://www.logicbuy.com/product/Dell-Marketing-USA-LP-Dell-ST2010-20-Inch-16-9-Aspect-Ratio-Flat-Panel-Monitor/B002J9GVG2.aspx
You can usually get free shipping on both deals.
Total: $150
I did spend a little extra on some monitor arms, so second monitor can swing down below the main screen for simming, or to the side for work. Now you have a second monitor for keeping a browser open while you work, watching training videos, Skype while gaming, editing .lua files, etc. ;)
Personally I don't like touchscreens when you have split seconds to make your input. Too easy to hit the wrong button. Buttons are much more definite. Also the small 7-8" screens are almost $100 each (if not more!) by the time you ship them so you're actually spending more for a smaller MFD image. Plus this way you have room for a whole instrument panel, map, whatever. Even with TIR it saves so much time looking down. I think this is the perfect setup for someone who wants a simple, cheap-ish multi-use homepit without getting into hacking real gauges. Would never go back.